Sheet gripping and pulling tool



Jan. 25, 949. v. H. HAssELQuls'r 2,460,007

SHEET GRIPING, AND PULLING TOOL Filed @QL 19. 1944 V/////////}vf' fattachment and. detachment.

Patented Jmzs, 1949 u N l T Eo PATE Nr o Fr l c e PJLINGL TOOL vicios-H;nasslqmst, Akron,

Ohio, assigner to- 'ihe B.,F.1 Goodrich Qompany;,.Newf York, N. Y.,kacorporatiomofeNew Yorkl l I Application Cctober 19,11944:,,Selhitlllth` 559,393

ZIICIzimS. (Cl. 817-43.)

pulling sheet material and is especially u'sefulin stretchingice-removingv and other coverings about thevr surfaces of aircraft.v

Objects of the invention are sure grip on the margin of a coveringwithout injury to the covering.to. provide for a convenient handle onthe covering' for manual stretching of the covering; to provide levermeans for amplifying manual eiort, Vand to-providequick These and otherobjects' ill" appear from the following description and the accompanyingdrawings. i

Cf the drawings: Fig. l isa perspective view ofan'airplanezshowing lanice-removing covering-"partially applied thereto and showing a toolconstructed inaccordance with and, embodying the inventioninposif tionto stretch a portion of thercoverin'gf. Fig. 2 is a side elevation.ofthe'tool shown par"- tially in section and in gripping position, apart of the covering being also shown. i

Fig. 3 is a view to a larger scale of the operating nose of the toolshown in its released position, the

.view being in longitudinal vertical section. l

Fig. 4 isY a perspective View of a toggle member.

Fig. 5 is a perspective view o a modification ofv the invention in usein applying a covering.

Referring to the drawings, the tool `is formed with a tubular hollowL-shaped housing having a relatively long operating portion l and arelatively short handle or grip portion Il. The operating portion has anopen end which is partially closed by a block I2 and is notchedtherebelow, as at f3, to receive the margin of the covering le. Thenotch I3 terminates in shoulders l3nt providing a locatingfsuriaceforthe edge of the covering. The block l2 serves to provide ,av Y guideto the covering entering the notch and to this end has a curved surfacel5 inclined'toward the notch.V Y

For providing. positive grip of the covering while at the same timeavoiding injury thereto, the lower wall of the housing extends beyondthe notch to provide a iixed jaw E5. A moveable jaw il of springmaterial is secured to the'housing as by vscrews I3 atV a positionremote from the fixed jaw and normally stands away from the iixed jaw.For moving the moveablejaw t0- Vward the Xed jaw, a handle lever 2!) ispivotally secured to the housing as at 2! near the elbow 'of the housingand extends through Aa Vcleaianrlce opening 2?. therethrough along thehandle portion il. A link23 is pivotally securedto'the lever, as

to provide for a.

j 3l. Where this is the case, the moveable jaw at 24 and^rl extendsthrough the' hollow operating portion ofthe-housing. The link is formedwith notches 25, 26in the upper and lower faces ornear its outer end forreceiving a pair of toggle links 21, 21a in the form of and acting asmoving struts. A notch 28 isformed.' in the housing to ruler-urn thelinkll'` andanotch 29 is formed in the moveablejmv |113' to fulcrum thelink 2S. The block i2.

acts-:as a stopy to limit movement of the link 23 in theoutward'direction beyond'a dead center posi tion while the handleportion ll of the housing limitsmovement of the lever 2e and thereby thelink 23 in Vthey opposite direction.' V"ll'iearrangeM ment: is such thatwhen the lever 20 is pushed away fromr the handle portion, the links 2,2in assumev the inclined position of Fig. 3k and the moveable-jaw HspringsV away from the iixed jaw Y |161 to release the covering, andwhen the' lever 'et y ismoved toward the handle portion l i, the links21', 21a,are moved substantially to a perpendicularposi'tion, as in Fig.2, with the strong action ci moving struts, and move the moveable jawsl? toward the xed jaw with great force. Due to the high pressuredeveloped by the toggle movement, the jaws may be smooth and of greatarea to avoid injury to the covering while nevertheless providing astrong grip on the covering.

The covering M- is usually provided with a thickened margin 36reinforced by a bead core l? of the tool is formed with a rib 32 toengage ben yond the thickened margin 3l) and securely lock the coveringto the tool. In the locking position, the toggle links 21, Ela aresubstantially at a dead center position so that the covering is securelyretained even when the handle 2d is released.V

In use where a covering le is to be stretched about the surface of anairfoil to align apertures I'4a in the covering with apertured hollowinternally threaded rivets secured to the airfoil, the tool is held withits iixed jaw adjacent the surface of the airfoil, the handle lever 26Bis pushed away from the handle portion l l, and the notch of the housingis advanced over the margin of the cover ing until the locating surfacesi3d touch the edge of the covering. The handle lever 2B is then pushedtoward the handle portion il, straightening the Vtoggle and gripping themargin of the covering. The covering may then ce stretched, by pullingon the handle portion, to a position Where screws may be entered intothe hollow rivets through the apertures lia of the covering. Byproceeding progressively along the margin oi the covering withVsuccessive pulling operations,

Y by the following claims.

progressively secured to the 2,460,007 Y Y Y a and saidV tubular bodyrespectively at opposite sides of said element of the toggle adjustingmeans.

2. A gripping and pulling tool for applying a Y covering of sheetmaterial to a surface, said tool comprisinga tubular'body having allongitudinal open notch at an VendV thereof to receive amargin of acovering,'a wallrof said vbody adjacent Y .the notch having a stationaryjaw, a moveable stretched progressively over the airfoil in'tofalignment with the pins and its apertures passed thereover to secure itin stretched condition; In

effecting step by step stretching the fulcrum arms.

40 isheld against a pin laterally adjacent to the gripped portion Vandthe tool is swung about such A pin as a fulcrum to assist inthe pullingaction' After Vthe coveringl has been secured overall ofthe pins, thepins' as shown in the drawing.

are removed one at a time and replaced as'. removed with permanentsecuring screws.

Variations may be Vmade Vwithout departing from the scope of theinvention as it is defined Iclaim: V- Y w V1. A gripping and pullingtool for applying 'a covering of sheet material to a suriacesaidV toolcomprising a tubular'body having a longitudinal open notch at an endthereof to receive a margin Vof a coveringla wall of said body adjacentthe' notch having a stationary jaw, a moveable jaw mounted insaid'tubular body,A toggle means be# tween said moveable jaw and awallroisaid body opposite said'xed jaw, a handle at ,the end of saidbody opposite said notch'for manipulating said body, and meanscomprising an element eX- tending through said tubular body `fromaregion K adjacent said handle for moving said ltoggle means to clampsaid jaws upon a margin oi the covering,V said togglemeans Acomprising apair of moving'struts engaging said `moveable Vjaw jaw mounted in saidtubular body, toggle means between said moveable jaw and a wall ci saidbody opposite said fixed jaw, a handle at the end vof said bodyvoppositesaid notch for manipulatingv said body andA meansl comprising a rodelement extendingthrough said tubular body from a region adjacent saidhandle for adjusting said j toggle means to clamp said jaws upon amargin 'of the covering, said toggle means comprising a pair-lof movingstruts engaging said moveable jaw and said tubular body respectively andhaving connection with said 'rodelement 'ofthe tog- Ygleadjusting meansat opposite sides of the lat- Number ter; and said toggle Yadjustingmeans comprising a lever pivoted on saidbody adjacent said handle andpivotally connected to said rod element.Y

; Y VICTOR H. HASSELQUIST.

Y REFERENCES CITED The following references are of record in the 111eYof this patent: Y

.- UNITED STATES Pli'rnirr'sV Name A Date Y 893,602 Bond L. Q July 21,1908 1,224,846 Brooks May 1, 1917 1,237,875 YDickerson Aug. 21, 19171,314,072 Ensteness i.-- Aug.' 26, 1919 V1,35fi,948 VvWheatherly eoe-Oct. 26, 1929 1,765,783 f Young June 24,1930 2,082,669 Voigt` ;i June 1,1937 1944 Colley V s Julyv 18,

